package com.kuang.config;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

//拦截器           需要配置bean
public class LoginHandlerInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //登录成功之后，应该有用户的session

        Object loginUser = request.getSession().getAttribute("loginUser");

        if (loginUser==null){//没有登录
            request.setAttribute("msg","没有权限，请先登录");
            request.getRequestDispatcher("index.html").forward(request,response);
            return false;
        } else {
            return true;
        }
    }
}
